交互式动态体三维显示关键技术  

Key Technologies of Interactive Dynamic Volumetric 3D Display

作　　者：潘文平[1] 沈春林[1] 蔡亮[1] 邢建芳[1] 李莉[1] 

机构地区：[1]南京航空航天大学自动化学院,南京210016

出　　处：《科技导报》2011年第1期44-51,共8页Science & Technology Review

基　　金：国家高技术研究发展计划(863计划)项目(2007AA01Z338)

摘　　要：研究了交互式动态体三维显示的关键技术,包括三维数据体素化、体素激活、体空间生成和人机交互等,实现了体三维显示系统样机。其中,采用体立方栅格(BCC)采样策略以减少体素化生成的体显示数据,以数字微镜器件(DMD)作为空间光调制器(SLM),并针对DMD设计了二值切片的快速激活算法;分析了基于旋转螺旋面的体三维空间生成方法,并将基于隐马尔科夫模型(HMM)的动态手势控制应用于交互式体三维显示系统。针对原理样机设计的各组实验表明,BCC体素化策略减少了40%以上的体显示数据,基于DMD的切片快速激活算法使得在500mm×250mm半圆柱形成像空间内显示的三维图像刷新率达16Hz、并且可以选择任意视点裸眼观看,准确率超过93%、响应时间低于40ms的动态手势识别算法能够较好地实现实时交互式体三维显示。Key technologies of dynamic Volumetric Three-Dimensional（V3D） display is implemented in our prototype,which include 3D data voxelization,voxel activation,volumetric space creation,and human-computer interface,where 3D models are voxelized through Body-Cubic Center（BCC） sampling strategy for data reduction.Digital Micro-mirror Device（DMD） is used as the Spatial Light Modulator（SLM） and an algorithm is designed for binary slice projection based on DMD.An approach for volumetric space creation based on a rotating helical screen is also adopted.Furthermore,a hand gesture control-based HCI subsystem for the prototype is designed and implemented.Experimental results demonstrate that,a data reduction of more than 40% is achieved through utilizing BCC sampling strategy,and objects can be displayed with true three dimensions at a refresh rate of 16Hz in a half-cylinder display space with a diameter of 500mm and a height of 250mm,and can be viewed from almost any angle without any special viewing aids.With the hand gesture control subsystem,the average recognition rate is as high as 93%,the average response time is less than 40ms,and the real-time interactions can be well performed from an arbitrary viewpoint.

关 键 词：体三维显示 数字微镜器件 手势识别 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]